Hi all, I have some problems with gethostid functions. When I run it on some nodes of my cluster I get the same return value although hostnames and IP addresses are different. Here are the logs for 2 nodes (test program is in the attach, as well as cygcheck output).
C:\Users\gribov.y>\\s-cw-head\pgas\a.exe hostname = S-CW-NODE52 hostent: h_name = S-CW-NODE52.XXX address: 10.2.0.48 address: 192.168.80.1 address: 192.168.169.1 id = 364106303 15b3d23f C:\Users\gribov.y>\\s-cw-head\pgas\a.exe hostname = S-CW-NODE53 hostent: h_name = S-CW-NODE53.XXX address: 10.2.0.56 address: 192.168.93.1 address: 192.168.244.1 id = 364106303 15b3d23f Note that ids are equal although IP addresses are clearly different. Some details: 1) I have replaced my domain name with XXX. 2) I run my program outside of Cygwin environment (i.e. not in bash); not sure whether it's important Has anyone seen this before? This may be due to some misconfig of my cluster but I'm not sure what I should check. -- Best regards, Yuri
cygcheck.out
Description: Binary data
#include <stdlib.h>
#include <stdio.h>
#include <netdb.h>
int main(int argc, char **argv) {
char tmp[128];
struct in_addr **pptr;
FILE *hosts;
if( argc > 1 && (hosts = fopen("/etc/hosts", "rb")) ) {
printf("/etc/hosts:\n");
while( !feof(hosts) ) {
fgets(tmp, sizeof(tmp), hosts);
printf("Next line: %s\n", tmp);
}
fclose(hosts);
}
gethostname(tmp, sizeof(tmp));
printf("hostname = %s\n", tmp);
struct hostent *e = gethostbyname(tmp);
printf("hostent:\n");
printf("h_name = %s\n", e->h_name);
for(pptr = (struct in_addr **)e->h_addr_list; *pptr; ++pptr) {
printf("address: %s\n", inet_ntoa(**pptr));
}
long id = gethostid();
printf("id = %u %x\n", (unsigned)gethostid(), (unsigned)gethostid());
return 0;
}
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